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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Income Tax [Line Items] |  |  |  |
Effective tax rate | 16.20% | 21.60% | 14.80% | 17.20%
Income tax expense (benefit) | $ 43,387 | $ 53,894 | $ 108,091 | $ 117,255
Excess tax benefit recognized | $ 27,604 | $ 12,585 | $ 86,809 | $ 58,607

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